FBI Probes New Computer Worm
Hitting Users of Microsoft Software

WASHINGTON -- A rogue software program attacked computers world-wide with remarkable aggressiveness, spreading so quickly that e-mail and Web browsing was slowed or interrupted for many users.

U.S. Attorney General John Ashcroft said the eventual effect of the virus-like software could prove to be worse than the broad disruptions caused this summer by the "Code Red" software. The case was quickly turned over to the Federal Bureau of Investigation, which already has been working around the clock on last week's terrorist...